A025066 - cp's OEIS frontend

A025066 a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ] and s = A023532.

n	a(n)
1	0
2	1
3	1
4	0
5	2
6	1
7	2
8	2
9	3
10	2
11	3
12	4
13	3
14	4
15	4
16	5
17	6
18	5
19	5
20	6
21	7
22	6
23	8
24	7
25	8
26	8
27	10
28	8
29	9
30	10
31	10
32	11
33	11
34	11
35	12
36	11
37	12
38	14
39	14
40	13
41	14
42	15
43	14
44	15
45	16
46	15
47	18
48	16
49	17
50	17
51	19
52	19
53	19
54	19
55	19
56	20
57	21
58	20
59	21
60	22
61	23
62	23
63	23
64	22
65	24
66	24
67	24
68	26
69	26
70	25
71	26
72	28
73	27
74	27
75	28
76	27
77	31
78	28
79	30
80	30
81	30
82	30
83	32
84	32

[0, 1, 1, 0, 2, 1, 2, 2, 3, 2, 3, 4, 3, 4, 4, 5, 6, 5, 5, 6, 7, 6, 8, 7, 8, 8, 10, 8, 9, 10, 10, 11, 11, 11, 12, 11, 12, 14, 14, 13, 14, 15, 14, 15, 16, 15, 18, 16, 17, 17, 19, 19, 19, 19, 19, 20, 21, 20, 21, 22, 23, 23, 23, 22, 24, 24, 24, 26, 26, 25, 26, 28, 27, 27, 28, 27, 31, 28, 30, 30, 30, 30, 32, 32]

cp's OEIS Frontend

A025066 a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ] and s = A023532.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	0
5	2
6	1
7	2
8	2
9	3
10	2
11	3
12	4
13	3
14	4
15	4
16	5
17	6
18	5
19	5
20	6
21	7
22	6
23	8
24	7
25	8
26	8
27	10
28	8
29	9
30	10
31	10
32	11
33	11
34	11
35	12
36	11
37	12
38	14
39	14
40	13
41	14
42	15
43	14
44	15
45	16
46	15
47	18
48	16
49	17
50	17
51	19
52	19
53	19
54	19
55	19
56	20
57	21
58	20
59	21
60	22
61	23
62	23
63	23
64	22
65	24
66	24
67	24
68	26
69	26
70	25
71	26
72	28
73	27
74	27
75	28
76	27
77	31
78	28
79	30
80	30
81	30
82	30
83	32
84	32

n	a(n)
1	0
2	1
3	1
4	0
5	2
6	1
7	2
8	2
9	3
10	2
11	3
12	4
13	3
14	4
15	4
16	5
17	6
18	5
19	5
20	6
21	7
22	6
23	8
24	7
25	8
26	8
27	10
28	8
29	9
30	10
31	10
32	11
33	11
34	11
35	12
36	11
37	12
38	14
39	14
40	13
41	14
42	15
43	14
44	15
45	16
46	15
47	18
48	16
49	17
50	17
51	19
52	19
53	19
54	19
55	19
56	20
57	21
58	20
59	21
60	22
61	23
62	23
63	23
64	22
65	24
66	24
67	24
68	26
69	26
70	25
71	26
72	28
73	27
74	27
75	28
76	27
77	31
78	28
79	30
80	30
81	30
82	30
83	32
84	32

n	a(n)
1	0
2	1
3	1
4	0
5	2
6	1
7	2
8	2
9	3
10	2
11	3
12	4
13	3
14	4
15	4
16	5
17	6
18	5
19	5
20	6
21	7
22	6
23	8
24	7
25	8
26	8
27	10
28	8
29	9
30	10
31	10
32	11
33	11
34	11
35	12
36	11
37	12
38	14
39	14
40	13
41	14
42	15
43	14
44	15
45	16
46	15
47	18
48	16
49	17
50	17
51	19
52	19
53	19
54	19
55	19
56	20
57	21
58	20
59	21
60	22
61	23
62	23
63	23
64	22
65	24
66	24
67	24
68	26
69	26
70	25
71	26
72	28
73	27
74	27
75	28
76	27
77	31
78	28
79	30
80	30
81	30
82	30
83	32
84	32